media config: expand is_encrypted to a struct.

media/formats/webm/webm_audio_client.h

Index: media/formats/webm/webm_audio_client.h
diff --git a/media/formats/webm/webm_audio_client.h b/media/formats/webm/webm_audio_client.h
index fefa55ff2f947aa900ada18941cc39257d89ac5a..06d7e0c6caa769e0be31de065069902eee310518 100644
--- a/media/formats/webm/webm_audio_client.h
+++ b/media/formats/webm/webm_audio_client.h
@@ -16,6 +16,7 @@
 
 namespace media {
 class AudioDecoderConfig;
+class EncryptionScheme;
 
 // Helper class used to parse an Audio element inside a TrackEntry element.
 class WebMAudioClient : public WebMParserClient {
@@ -27,8 +28,8 @@ class WebMAudioClient : public WebMParserClient {
   void Reset();
 
   // Initialize |config| with the data in |codec_id|, |codec_private|,
-  // |is_encrypted| and the fields parsed from the last audio track element this
-  // object was used to parse.
+  // |encryption_scheme| and the fields parsed from the last audio track element
+  // this object was used to parse.
   // Returns true if |config| was successfully initialized.
   // Returns false if there was unexpected values in the provided parameters or
   // audio track element fields.
@@ -36,7 +37,7 @@ class WebMAudioClient : public WebMParserClient {
                         const std::vector<uint8_t>& codec_private,
                         const int64_t seek_preroll,
                         const int64_t codec_delay,
-                        bool is_encrypted,
+                        const EncryptionScheme& encryption_scheme,
                         AudioDecoderConfig* config);
 
  private: